Sebastian Krüger
f1fc803b0e
Update musical note unit labels to include "(ms)" suffix to make it clear that values represent durations in milliseconds, not counts. Before: "120 BPM = 2,000 Whole Notes" (confusing - sounds like a count) After: "120 BPM = 2,000 Whole Note (ms)" (clear - it's a duration) Changes: - All note units now show "(ms)" in both singular and plural forms - Triplet labels shortened for brevity (e.g., "Quarter Triplet (ms)") - Makes the conversion meaning immediately clear to users 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
118 lines
3.6 KiB
TypeScript
118 lines
3.6 KiB
TypeScript
/**
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* Custom tempo/BPM measure for convert-units
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*
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* Converts between BPM and note durations in milliseconds.
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* Uses a reciprocal relationship where BPM (beats per minute) is the base unit.
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*
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* Formula: milliseconds per beat = 60000 / BPM
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*
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* The to_anchor value represents the conversion factor:
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* - For BPM → time units: multiply by to_anchor to get milliseconds
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* - For time units → BPM: divide by to_anchor to get BPM
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*/
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export const tempoMeasure = {
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tempo: {
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systems: {
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metric: {
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// BPM as the base unit (1 BPM = 60000 ms per beat)
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'BPM': {
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name: { singular: 'Beat per Minute', plural: 'Beats per Minute' },
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to_anchor: 1
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},
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// Whole note (4 beats) = 240000 / BPM
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'whole': {
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name: { singular: 'Whole Note (ms)', plural: 'Whole Note (ms)' },
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to_anchor: 240000
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},
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// Half note (2 beats) = 120000 / BPM
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'half': {
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name: { singular: 'Half Note (ms)', plural: 'Half Note (ms)' },
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to_anchor: 120000
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},
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// Quarter note (1 beat) = 60000 / BPM
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'quarter': {
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name: { singular: 'Quarter Note (ms)', plural: 'Quarter Note (ms)' },
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to_anchor: 60000
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},
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// Eighth note (0.5 beats) = 30000 / BPM
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'eighth': {
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name: { singular: 'Eighth Note (ms)', plural: 'Eighth Note (ms)' },
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to_anchor: 30000
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},
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// Sixteenth note (0.25 beats) = 15000 / BPM
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'sixteenth': {
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name: { singular: 'Sixteenth Note (ms)', plural: 'Sixteenth Note (ms)' },
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to_anchor: 15000
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},
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// Thirty-second note (0.125 beats) = 7500 / BPM
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'thirty-second': {
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name: { singular: 'Thirty-Second Note (ms)', plural: 'Thirty-Second Note (ms)' },
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to_anchor: 7500
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},
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// Dotted notes (1.5x the duration)
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'dotted-half': {
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name: { singular: 'Dotted Half Note (ms)', plural: 'Dotted Half Note (ms)' },
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to_anchor: 180000 // 3 beats
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},
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'dotted-quarter': {
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name: { singular: 'Dotted Quarter Note (ms)', plural: 'Dotted Quarter Note (ms)' },
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to_anchor: 90000 // 1.5 beats
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},
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'dotted-eighth': {
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name: { singular: 'Dotted Eighth Note (ms)', plural: 'Dotted Eighth Note (ms)' },
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to_anchor: 45000 // 0.75 beats
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},
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'dotted-sixteenth': {
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name: { singular: 'Dotted Sixteenth Note (ms)', plural: 'Dotted Sixteenth Note (ms)' },
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to_anchor: 22500 // 0.375 beats
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},
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// Triplet notes (2/3 of the duration)
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'quarter-triplet': {
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name: { singular: 'Quarter Triplet (ms)', plural: 'Quarter Triplet (ms)' },
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to_anchor: 40000 // 2/3 beat
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},
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'eighth-triplet': {
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name: { singular: 'Eighth Triplet (ms)', plural: 'Eighth Triplet (ms)' },
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to_anchor: 20000 // 1/3 beat
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},
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'sixteenth-triplet': {
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name: { singular: 'Sixteenth Triplet (ms)', plural: 'Sixteenth Triplet (ms)' },
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to_anchor: 10000 // 1/6 beat
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},
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// Milliseconds as direct time unit
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'ms': {
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name: { singular: 'Millisecond', plural: 'Milliseconds' },
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to_anchor: 60000 // Same as quarter note
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},
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// Seconds
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's': {
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name: { singular: 'Second', plural: 'Seconds' },
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to_anchor: 60 // 60 seconds per beat at 1 BPM
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},
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// Hertz (beats per second)
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'Hz': {
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name: { singular: 'Hertz', plural: 'Hertz' },
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to_anchor: 1 / 60 // 1 BPM = 1/60 Hz
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}
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}
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}
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}
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};
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